Brake-shoe.



No. 882.107. PATENTEDMARIT, 1908.- w. BHGOODWIN. BRAKE SHOE.

APPLICATION FILED JUNE17,1907.

r i Ill/M 001,

I V I 9 WITNESSES: William B. Goodwin, INVENTOR.

A TTORNE Y.

UNITED srlia ns earner onrrca.

WILLl'AM B. GOODWIN, 01* COLUMBUS, OHIO.

BRAKE-SHOE Application filed June 1'2,

To all whom it may, concern:

Be it known that VVILLIAM B. GOODWIN, a citizen of the United States, residing at Columbus, in the county of Franklin and State o Ohio, has invented certain new and useful lmprovernentsin Brake-Shoes, of which the following is a specification.

My'invention relates to improvements in brake-shoes and in theshells for containing said shoes and consists essentially of a back or shell portion towhich is to be secured in an appropriate manner a filling made up of a composition of matter, which is capable of Withstandin the strains and shocks incident to the use 0 a brake-shoe, andwhich at the same time is inexpensive and highly ellicient, and when worn down can readily be replaced. One shell may accordingly be used with a series of fillings, and as the shell portion, being preferably made of steel, is expensive, it is desirable to form a 'brake shoe in such manner that the shell portion will not be worn.

Hitherto, brake-shoe shells have been formed of metallic backs, sides, and ends, and the wear thereon in service reduces .the shell as rapidly as the inner or filling ma terial. Therefore, when the shoe proper needed repair, it was found that the shell also needed replacing, so the life of the shell was no greater than that of the filling thereof.

The chief objects of my improvement are to attach the filling material to the shell in such manner that the 'iilling material alone will be worn away in service, the shell remaining intact; further, the filling material 1 employ is a composition of matter, is inexpensive and very durable, and yet whenever it is worn away to such an extent as to require replacing, I provide means by which it can readily be detached from the back or shell port-ion without injuring or in any man ner lessening the elliciency of the latter.

lVith these and other objects in mind, I provide a brake-shoe shell essentially as shown on the accompanying drawings, in which Figure l is a side view of a shell or back partly in section; Fig.- 2 is a top view of the same; Fig. 3 is a side view partly in section of P modified form of back or shell-having a shallow flange depending from the back portion; Fig. 4 is a vertical longitudinal section through the filling for the brake-shoe shell, showing the manner of securing the same to the back Fig. 5 is a perspective of one of Specification oi Letters Patent.

Patented March 17, 1908.

1907. Serial No. 379,396.

I the bolts used for securing the filling to the back.

.liLlfEl'Ill'lg to the drawings which are hereby made a part of this specification, in

which the same reference numerals designate like parts throughout, 1 is the back or shell without the side and end flan es, being partly in section, and having the hanger attaclnnent 2 preferably made integral therewith, saidback being provided with the bolt holes 3, 4, 5, and 6, wlnch may be increased in number as desired. The outer portion of the shell. is preferably provided with the corrugations 7 and S,*which will-strengthen the same.

The shell or back portion may be made with a shallow flange 9 depending from the sides and ends thereof, for the purpose of providing abutting walls for the filling; this slight flange will give some assistance in holding the filling material in place Within the shell.

The filling material 10, shown in Fig. 4, is a composition of matter, which is preferably wrapped or bound by a covering 11, which may be made of metal or paper or wood, any material being suitable which will prevent the filling from a tendency to disintegrate or become friable on account of the constant shock or jarring thereof due to the use of the brake-shoe in service. The covering material need not be very strong to accomplish this. as has been shown by experiment. \Vhen the block of material forthispurpose is being pressed into shape, bolts 12 and 13 are embedded therein; these bolts are provided with washers 14 of comparatively great diameter, which will give great firmness to the bolt and very efi'ectively secure the same within the body of the material. The block of material for use as a brake-shoe being prepared in this way with bolts and a covering, and. of the dimensions required by the circumstames, is secured to the shell or back portion by passing the bolts through the openings therein, and placing a nut- ]5 thereon in the usual manner. Instead of bolts, large screws, such as are used for wood, may be employed, the same being inserted through the back into the f lling material. in this manner a brake-shoe formed preterably of two portions is provided; the back portion or shell being formed of steel pre erably and not intended to come in contact with the wheel to be abraded in any 1" -.-.inner; this shell will therefore not need to be re placed unless it be broken, whch will not i ma be secured to and easily made, (tron against the r'na readily she and anew again and a frequently ha pen under ordinary condit ons. The "filling material is formed of a composition-of mattei which is inexpensive and easily secured in posishell or back in some such manner as described. It is seen that all of the wear due to'contact of the shoe With the Wheel is borne'bfy the filling material, and when this is worn away to such anextent as 'to need re lacing, the remainder thereof e detached from the back or filling placed therein. This may be done easily and with slight expense.

Meanwhile, the back or shell portion which is made preferably-- of steel and therefore is comparatively expensive,

am with the filling material. On account of t erapid deterioration of metallic brake-shoes, those havin shells, the "sides of which a'recoextensive With the thickness-of the material formingthe filling are worn fawa withgthe shoe and .conse 'uently the who e structure must be replace each time the shoe proper i Worn down too far for fur ther use. My improvement therefore provides a brake-shoe andshellwhich Wear longer; than the metallic shoe,-and when they need to be replaced it may be done at a slight expense and the steel back or shell which is the more expensive portion may be used a number of times.

' The shell for containing the filling material the back by means of bands'or wires if desired, in a manner which is readilv understood; 1 have illustrated only may be utilized.

composition of matter in said shell member,

bolts anchored in said composition of matter 4 and extending outwardly through said regis terin openings whereby said back and shell mem ersa're'removably secured together.

2. A brake-shoe com rising a back member, a single integral she l member adapted to be applied throughout its length to. said back member, a composition of matter in said shell member, and fastening means removably uniting said members,'whereby the shell member may be replaced when the com position of matter is Worn away Without re' newing the back member.

3. A brake-shoe comprising a back mernber, asingle integral shell member having backyside, and end Walls,

a filling therefor formed o'f-a composition of matter adapted to engage irictionally with a-Wheel, bolts em bedded in said composition extending out- Wardly through said back member to secure said shell member removably thereto.

In testimony whereof I aifizcmy signature in the presence of tWo Witnesses. v

" WrLLrAi/r' n. Goo'nWm.

Witnesses: v

-GE0.'W.R1GHTMIRE WILLIAM H. Timssn. 

